CN-122017652-A - Safety early warning method and system for multi-parameter fusion of energy storage cabinet

CN122017652ACN 122017652 ACN122017652 ACN 122017652ACN-122017652-A

Abstract

The application relates to a safety pre-warning method and a system for multi-parameter fusion of an energy storage cabinet, and relates to the field of energy storage equipment safety technology; the method comprises the steps of constructing a component operation interval and a similar interval to determine the farthest similar point and the farthest interval time according to the component operation working condition, determining a point before matching attenuation and a point after matching attenuation, determining a single attenuation coefficient according to multidimensional detection parameters of the point before matching attenuation and the point after matching attenuation, determining an integral attenuation coefficient according to the single attenuation coefficient, determining an initial detection parameter according to the component operation working condition, determining a predicted detection parameter according to the initial detection parameter and the integral attenuation coefficient, determining a parameter deviation distance according to the predicted detection parameter and the current multidimensional detection parameter, and outputting a safety pre-warning signal when the parameter deviation distance is larger than the allowable deviation distance. The application has the function of improving the early warning effect of the energy storage cabinet early warning system.

Inventors

ZHANG WENFENG
ZHANG XIN
LI LIUQING

Assignees

浙江森储能源集团有限公司

Dates

Publication Date: 20260512
Application Date: 20260410

Claims (7)

1. The multi-parameter fusion safety pre-warning method for the energy storage cabinet is characterized by comprising the following steps of: acquiring multidimensional detection parameters of a battery pack, assembly operation conditions and assembly operation time; Constructing a component operation interval taking the current time point as a rear end point and the width as the component operation duration and a similar interval with the width as the preset similar duration on a preset time axis; determining the farthest similar point and the farthest interval time in the component operation interval according to the component operation working conditions of all time points in the similar interval, and determining the point before the matched attenuation and the point after the matched attenuation according to the largest farthest interval time; calculating according to the multidimensional detection parameters of the points before and after the matching attenuation to determine the attenuation coefficient of the monomer; Constructing a similar interval again at the front point of the matched attenuation to update the front point of the matched attenuation and the rear point of the matched attenuation until the interval time between the front point of the matched attenuation and the front point of the running interval of the component is smaller than the preset initial time, and stopping updating the front point of the matched attenuation; Calculating according to all monomer attenuation coefficients to determine an overall attenuation coefficient, and determining corresponding initial detection parameters of the current assembly operation working condition according to a preset initial matching relation; Calculating according to the initial detection parameters and the integral attenuation coefficient to determine predicted detection parameters, and calculating according to the predicted detection parameters and the current multidimensional detection parameters to determine parameter deviation distances; And outputting a safety early warning signal when the parameter deviation distance is larger than the preset allowable deviation distance.
2. The method for safety precaution of multi-parameter fusion of energy storage cabinets according to claim 1, wherein after the determination of the farthest interval time, the method for safety precaution of multi-parameter fusion of energy storage cabinets further comprises: defining the maximum farthest interval time as a single upper limit time, and constructing a single unit interval according to the single upper limit time and a preset single unit time; judging whether the farthest interval time length except the single upper limit time length exists in the single unit interval; If the farthest interval time except the single upper limit time is not existed in the single unit interval, determining a point before the matching attenuation and a point after the matching attenuation according to the single upper limit time; if the farthest interval time except the single upper limit time exists in the single unit interval, determining a monomer attenuation coefficient according to each farthest interval time in the single unit interval; and calculating and analyzing according to the attenuation coefficients of the monomers to determine the reasonable attenuation coefficient, and determining the point before the matched attenuation and the point after the matched attenuation according to the farthest interval time length of the maximum reasonable attenuation coefficient.
3. The method for safety precaution of multi-parameter fusion of energy storage cabinets according to claim 2, wherein the step of calculating and analyzing according to the attenuation coefficients of the individual units to determine the reasonable attenuation coefficients comprises the steps of: Calculating according to the monomer attenuation coefficient and the corresponding farthest interval time length to determine a unit attenuation coefficient; Constructing an attenuation internal interval according to the largest unit attenuation coefficient and the smallest unit attenuation coefficient, and randomly generating an analog unit coefficient in the attenuation internal interval; calculating according to the simulation unit coefficients and all the unit attenuation coefficients to determine simulation representative coefficients, and defining the simulation unit coefficient of the largest simulation representative coefficient as an effective representative coefficient; And calculating according to the effective representative coefficient and the unit attenuation coefficient to determine the reasonable attenuation coefficient.
4. The energy storage cabinet multi-parameter fusion safety precaution method according to claim 3, characterized in that after the single attenuation coefficient is determined, the energy storage cabinet multi-parameter fusion safety precaution method further comprises: defining the unit attenuation coefficient of the determined monomer attenuation coefficient as a unit compensation coefficient; Determining attenuation compensation time length according to the rear end point of the similar interval and the matched attenuation rear point, and calculating according to the attenuation compensation time length and the unit compensation coefficient to determine an attenuation compensation coefficient; And calculating according to the attenuation compensation coefficient and the monomer attenuation coefficient to correct and update the monomer attenuation coefficient.
5. The method for safety precaution of multi-parameter fusion of energy storage cabinets according to claim 1, wherein after the construction of the similar section, the method for safety precaution of multi-parameter fusion of energy storage cabinets further comprises: Judging whether the farthest similar point exists or not; If the farthest similar point exists, determining the farthest interval duration according to the farthest similar point; if the farthest similar point does not exist, the component operation working condition of the rear end point of the current similar interval is defined as a special operation working condition; Constructing an exploration interval according to the rear end point of the current similar interval and the front end point of the component operation interval, and determining the similarity of the working conditions in the exploration interval according to the working conditions of the components and the special working conditions at each time point; determining comparison interval time according to each time point and the rear end point of the current similar interval, and determining reference suitability according to the comparison interval time and the working condition similarity; and determining the time point corresponding to the maximum reference fit as the farthest similar point to determine the farthest interval duration.
6. The method for safety precaution of multi-parameter fusion of energy storage cabinets according to claim 5, wherein after determining the reference suitability, the method for safety precaution of multi-parameter fusion of energy storage cabinets further comprises: judging whether at least two time points with the same reference suitability and the maximum reference suitability exist or not; If at least two time points with the same reference suitability degree and the maximum reference suitability degree do not exist, determining the time point corresponding to the maximum reference suitability degree as the farthest similar point; if at least two time points with the same reference suitability and the maximum reference suitability exist, determining the time point corresponding to the maximum reference suitability as an alternative similarity point; And defining the component operation working condition of the alternative similar points as alternative relative working conditions, determining the farthest separation time length in the exploration interval according to the alternative relative working conditions, and determining the alternative similar point corresponding to the largest farthest separation time length as the farthest similar point.
7. A safety precaution system for multi-parameter fusion of an energy storage cabinet, for implementing the safety precaution method for multi-parameter fusion of an energy storage cabinet according to any one of claims 1 to 6, comprising: the acquisition module is used for acquiring the multidimensional detection parameters of the battery pack, the operation working conditions of the components and the operation time of the components; the processing module is connected with the acquisition module and the judging module and is used for storing and processing information; The judging module is connected with the acquisition module and the processing module and is used for judging information; the processing module constructs a component operation interval taking the current time point as a rear end point and the width as the component operation duration and a similar interval with the width as the preset similar duration on a preset time axis; The processing module determines the farthest similar point and the farthest interval time in the component operation interval according to the component operation working condition of each time point in the similar interval, and determines the point before the matched attenuation and the point after the matched attenuation according to the largest farthest interval time; The processing module calculates according to the multidimensional detection parameters of the points before and after the matching attenuation to determine the monomer attenuation coefficient; The processing module builds a similar interval again at the point before the matching attenuation to update the point before the matching attenuation and the point after the matching attenuation until the time interval between the point before the matching attenuation and the front end point of the component operation interval is smaller than the preset initial time interval; The processing module calculates according to all the monomer attenuation coefficients to determine an overall attenuation coefficient, and determines corresponding initial detection parameters of the current assembly operation working condition according to a preset initial matching relation; The processing module calculates according to the initial detection parameters and the integral attenuation coefficient to determine predicted detection parameters, and calculates according to the predicted detection parameters and the current multidimensional detection parameters to determine parameter deviation distances; And when the judging module judges that the parameter deviation distance is larger than the preset allowable deviation distance, the processing module outputs a safety early warning signal.

Description

Safety early warning method and system for multi-parameter fusion of energy storage cabinet Technical Field The application relates to the field of energy storage equipment safety technology, in particular to a safety early warning method and system for multi-parameter fusion of an energy storage cabinet. Background The energy storage cabinet is used as a core carrier of the electrochemical energy storage system, and the operation safety of the energy storage cabinet is directly related to the stability of the whole energy storage power station and the safety of personnel and equipment. Along with the continuous improvement of the energy density of the lithium battery, the thermal runaway risk is increasingly prominent, and the traditional single parameter threshold alarming mode is difficult to meet the requirement of early warning due to response lag and easy interference of working conditions. Therefore, the current technical means gradually develop towards the multi-parameter fusion analysis direction, and multi-dimensional data such as electricity, heat, gas, sound and the like are acquired through deploying various sensors such as voltage, current, temperature, gas, smoke, sound and the like, and the operation state of the energy storage cabinet is comprehensively evaluated by utilizing a data fusion algorithm. In the existing multi-parameter fusion early warning method, a common technical route is to compare multi-parameter characteristic parameters acquired in real time with a multi-parameter reference model established by an energy storage cabinet in a historical healthy running state, and judge whether abnormality exists or not by calculating the deviation degree between real-time data and a healthy reference. In the related art, the phenomena of natural aging, increased internal resistance, capacity attenuation, consistency drift and the like of the battery inevitably occur in the long-term cyclic charge and discharge process of the energy storage cabinet, and the changes belong to the normal health state evolution rather than sudden faults, if the initial or fixed historical health state is still used as a comparison reference, the normal health state drift can be misjudged as abnormal along with the use time of the energy storage cabinet, so that the early warning effect of the early warning system is poor, and the improvement space is still provided. Disclosure of Invention In order to improve the early warning effect of an energy storage cabinet early warning system, the application provides a safety early warning method and system for multi-parameter fusion of an energy storage cabinet. In a first aspect, the application provides a safety precaution method for multi-parameter fusion of an energy storage cabinet, which adopts the following technical scheme: A safety pre-warning method for multi-parameter fusion of an energy storage cabinet comprises the following steps: acquiring multidimensional detection parameters of a battery pack, assembly operation conditions and assembly operation time; Constructing a component operation interval taking the current time point as a rear end point and the width as the component operation duration and a similar interval with the width as the preset similar duration on a preset time axis; determining the farthest similar point and the farthest interval time in the component operation interval according to the component operation working conditions of all time points in the similar interval, and determining the point before the matched attenuation and the point after the matched attenuation according to the largest farthest interval time; calculating according to the multidimensional detection parameters of the points before and after the matching attenuation to determine the attenuation coefficient of the monomer; Constructing a similar interval again at the front point of the matched attenuation to update the front point of the matched attenuation and the rear point of the matched attenuation until the interval time between the front point of the matched attenuation and the front point of the running interval of the component is smaller than the preset initial time, and stopping updating the front point of the matched attenuation; Calculating according to all monomer attenuation coefficients to determine an overall attenuation coefficient, and determining corresponding initial detection parameters of the current assembly operation working condition according to a preset initial matching relation; Calculating according to the initial detection parameters and the integral attenuation coefficient to determine predicted detection parameters, and calculating according to the predicted detection parameters and the current multidimensional detection parameters to determine parameter deviation distances; And outputting a safety early warning signal when the parameter deviation distance is larger than the preset allowable deviation distance. Optionally, after the